System and method for calculating image similarity and recording medium
A system and method for calculating image similarity, each of which generates a retouch image using characteristic amounts relating to color, respectively obtained from a first image and a second image, and calculates similarity between the first image and the second image based on at least the retouch image.
1. A system for calculating image similarity, the system comprising:
a memory to store a plurality of instructions; and
processing circuitry configured to execute the plurality of instructions to:
accumulate a plurality of reference images;
generate a plurality of retouch images, each retouch image being generated by using characteristic amounts of color information obtained from a corresponding reference image and the input image to transfer the color information from the corresponding reference image to the input image;
calculate, for each respective retouch image of the plurality of the retouch images, a similarity between the input image and the respective retouch image;
select a retouch image, of the plurality of retouch images, that has a similarity to the input image that is higher than similarities calculated for a remainder of the retouch images of the plurality of retouch images; and
output the retouch image.
2. The system of claim 1 , wherein the processing circuitry is configured to calculate, as the similarity, a synthesized similarity by weighting and synthesizing similarity obtained based on color information of the retouch image.
3. The system of claim 1 , wherein the processing circuitry is further configured to
transfer color information from the input image to a reference image to generate a first retouch image,
compare the first retouch image with the reference image to obtain a first inter-image similarity,
compare the retouch image with the input image to obtain a second inter-image similarity, and
synthesize the first inter-image similarity and the second inter-image similarity to obtain a synthesized similarity between the reference image and the input image to be used as the similarity between the reference image and the input image.
4. The system of claim 1 , wherein the circuitry is further configured to
transfer color information from the input image to another image to generate a second retouch image,
transfer color information from the reference image to the another image to generate a third retouch image, and
calculate a second similarity between the reference image and the input image based on the second retouch image and the third retouch image, to be used as the similarity between the first reference image and the input image.
5. The system of claim 1 , wherein
the processing circuitry is further configured to
acquire a plurality of images, and
reduce a data size of at least one of the acquired images, and
at least one of the reference image and the input image is the at least one acquired image having a data size being reduced.
6. A method of calculating image similarity, the method comprising:
accumulating a plurality of reference images;
generating a plurality of retouch images, each retouch image being generated by using characteristic amounts of color information obtained from a corresponding reference image and the input image to transfer the color information from the corresponding reference image to the input image;
calculating, for each respective retouch image of the plurality of the retouch images, a similarity between the input image and the respective retouch image;
selecting a retouch image, of the plurality of retouch images, that has a similarity to the input image that is higher than similarities calculated for a remainder of the retouch images of the plurality of retouch images; and
outputting the retouch image.
7. The method of claim 6 , wherein the calculating includes calculating, as the similarity, a synthesized similarity by weighting and synthesizing similarity obtained based on color information of the retouch image.
8. The method of claim 6 , further comprising:
transferring color information from the input image to a reference image to generate a first retouch image;
comparing the first retouch image with the reference image to obtain a first inter-image similarity;
comparing the retouch image with the input image to obtain a second inter-image similarity; and
synthesizing the first inter-image similarity and the second inter-image similarity to obtain a synthesized similarity between the reference image and the input image to be used as the similarity between the reference image and the input image.
9. The method of claim 6 , further comprising:
transferring color information from the input image to another image to generate a second retouch image; and
transferring color information from the reference image to the another image to generate a third retouch image, wherein
the calculating includes calculating a second similarity between the reference image and the input image based on the second retouch image and the third retouch image, to be used as the similarity between the reference image and the input image.
10. The method of claim 6 , further comprising:
acquiring a plurality of images; and
reducing a data size of at least one of the acquired images, wherein
at least one of the reference image and the input image is the at least one acquired image having a data size being reduced.
11. A non-transitory recording medium which, when executed by one or more processors, cause the processors to perform a method of calculating image similarity, the method comprising:
accumulating a plurality of reference images;
generating a plurality of retouch images, each retouch image being generated by using characteristic amounts of color information obtained from a corresponding reference image and the input image to transfer the color information from the corresponding reference image to the input image;
calculating, for each respective retouch image of the plurality of the retouch images, a similarity between the input image and the respective retouch image;
selecting a retouch image, of the plurality of retouch images, that has a similarity to the input image that is higher than similarities calculated for a remainder of the retouch images of the plurality of retouch images; and
outputting the retouch image.
12. The non-transitory recording medium of claim 11 , wherein the calculating includes calculating, as the similarity, a synthesized similarity by weighting and synthesizing is similarity obtained based on color information of the retouch image.
13. The non-transitory recording medium of claim 11 , wherein the method further comprises:
transferring color information from the input image to a reference image to generate a first retouch image;
comparing the first retouch image with the reference image to obtain a first inter-image similarity;
comparing the retouch image with the input image to obtain a second inter-image similarity; and
synthesizing the first inter-image similarity and the second inter-image similarity to obtain a synthesized similarity between the reference image and the input image to be used as the similarity between the reference image and the input image.
14. The non-transitory recording medium of claim 11 , wherein the method further comprises:
transferring color information from the input image to another image to generate a second retouch image; and
transferring color information from the reference image to the another image to generate a third retouch image, wherein
the calculating includes calculating a second similarity between the reference image and the input image based on the second retouch image and the third retouch image, to be used as the similarity between the reference image and the input image.
15. The non-transitory recording medium of claim 11 , wherein the method further comprises:
acquiring a plurality of images; and
reducing a data size of at least one of the acquired images, wherein
at least one of the reference image and the input image is the at least one acquired image having a data size being reduced.